Supporting base for portable electronic device



FIG. 1 is a front elevational view of a supporting base for portableelectronic device showing my new design;

FIG. 2 is a rear elevational view thereof;

FIG. 3 is a left side elevational view thereof;

FIG. 4 is a right side elevational view thereof;

FIG. 5 is a top plan view thereof;

FIG. 6 is a bottom plan view thereof;

FIG. 7 is a front perspective view thereof; and,

FIG. 8 is a rear perspective view thereof.

I claim the ornamental design for a supporting base for portableelectronic device, as shown and described.